Ejector



Sept. 27, 1932. D. G. LORRAINE 1,879,366

EJECTOR Filed April 21. 1950 A TTORNE Y.

Patented Sept. 27, 1932 l UNITED STATES Y DAVID GuLORRAINE, F LOS .ANGELES,GALIFRNIA nJncTon Application mea Aprn 21,

This invention is an ejector, the present application being a division of my cepending application Ser. No. 371,908, led June 18, 1929; and it is the object of the inven- 6 tion to provide novel means for pumping a relatively large volume nofany fluid at an appreciable pressure by means of a high pressure jet.

It is a further object of the invention to 1 provide an ejector wherein a high pressure jet of small volume is adapted to discharge a larger volume of fiuid at only a slightly reduced pressure, and to preferably arrange j the ejector as a multiple-stage jet wherein the initial jet is adapted to draw in a large volume of fluid and the succeeding et provides for discharge of the large volume of fluid at a but slightly reduced pressure which will in- N sure desired compression of the fluid.

It is a still further object Yof the invention to arrange the plurality of jets as interchangeable units adapted for convenient as-A sembly for providing any desired multiplestage ejection, thereby making for economy in manufacture and convenience in assembling units so as to produce any desired compression of a fluid. Y

It is a still further object of the invention to adapt the ejector for drawing in a. relativea0 ly large volume of a fiuid so that the fluid y moves circumferentially around the pressure jet for setting up a whirling action which will increase the efficiency of the ejector as .the relativelyV large volume of fluid kis discharged axially of the pressure jet.

Further objects of the invention will be readily understood from the following description of the accompanying drawing showing a preferred apparatus, and in which :V

Fig. 1 is a plain view of the ejector, partly in axial section.

Fig. 2 is a transverse section on the line 2-2 of Fig. 1.

The ejector is preferably a multiple-stage ejector comprising interchangeable ejector elements 17-18 detachably connected by a coupling 19 so as to form a two-stage ejector. Each of the ejector elements comprises acasing having an axial bore 2O and a lateral in- 5 let 21, with a nozzle 22 extending into one 1930. sieri-1110. 445,873. j end of bore 20, and a Venturi tube 23 preferably mounted in the opposite discharge end ofbore 20 and surrounding the end of the nozzle. The nozzle is connected to a supplyy conduit 16 for a gas at relatively high presyA55. i

sure, so that a comparatively small volume ,v of sai-d high pressure gas is discharged from the nozzle into Venturi tube 23, thereby drawing in a relatively large volume of any desired fiuid through inlet 21 and discharging 60 the same through the Venturi'tube at only slightly Vless pressure than lthat in the nozzle.`

The inlet 21 is preferably arranged with its longitudinal axisto one side of the axis of its nozzle 22 as shown in Fig. 2, so that the in'-` duced fluidl lwill move circumferentially around the nozzle for setting upv a whirling action in the Venturi tube and thereby increasing the efficiency of thej et. The nozzle is preferably longitudinally adjustable with 70l relation toits Venturi tube so that it maybe regulated for maximum efficiency in accordance with the pressuresof the jet, and for this purpose-the nozzle may be threaded into A a reduction' plug 24 mountedin the end of 75 the ejector casing, with'the adjustable nozzle connected to the fixed conduit 16vby a nipple 25 having threaded engagement with the nozzle.'V The Venturi'V tube 28 is preferably also j, axially Vadjustable for'regulating the jet in 80 accordance with the available pressure, and for this purposey the Venturi tube may be threaded into the bore of the ejector element as shown at 26. A The ejector elements 17-18 which com- 85 prise the two-stageejector are assembled with the inlet 21 of element 18 connected by coup*- ling v19 to the discharge end of the casing of elementv 17, and a pipe 13 through which thev induced flow is supplied to the ejector is con 9 nected to the inlet 21of ejector element 17, as for example by coupling 27, and the dischargeV end ofejector element 18 isY connected by a similar coupling 28 to a discharge pipe 8. The nozzles 22 for the two elements of the multiple-stage ejector may be connected by a branch conduit 30 which is coupled to conduit 16 by a union 31,-and the jet of ejector element 17 is thus `adapted to draw in ay large volume of gas throughv its inlet 21 and discharge the same into element 18 at appreciable pressure, and the jet of element 18 will discharge this large volume of gas at an increased pressure determined by the pressure ofthe jet, so that the large volume of gas delivered through pipe 8 will have a pressure only slightly less than that of the pressure of the jet.

I have thus provided an ejector adapted for whirling movement of the induced flow whereby a relatively'large volume of fluid vmay be discharged at a pressure only slightly less than that of the high pressure supplied through a jet of relatively small volume, and I have also adapted the jets for convenient assembly so as to provide Vfor any desired multiple-stage ejection, in order that a relatively large volume of Huid may be delivered at an appreciable Vpressure which need be but slightly less than the high pressure of the jets.

I claim: n

l. An ejector comprising a plurality of identical interchangeable elements; each in-A cluding al casing having an axial bore and alateral inlet, one end of the axial bore being a supply end and the opposite end of the axial bore being a discharge end, a nozzle projecting into the supply end of the axial bore and longitudinally adjustable relative to the casing, and a Venturi tube mounted in the discharge end of the axial bore, the nozzle forming a jet inducing flow through thelateralv inlet and discharging said `flow. under pressure through the Venturi tube, and the lateral inlet being at one side of the axis of the nozidentical interchangeable elements; each including a casing having an axial bore and a lateral inlet, one endk of the axial bore being a supply end and the opposite end of the axial bore being a discharge end, and a nozzle projecting into the supply end of the axial bore, the nozzle forming a jet inducing iow through the lateral inlet and discharging said flow under pressure through the discharge end of the casing, and the lateral inlet beingv at one side of the'y axis of the nozzle whereby the induced flow is moved circumferentially around the nozzle for whirling discharge through thedischarge end of the casing; and a straight coupling sleeve connecting the discharge end of one end of said interchangeable elements with the lateral inlet of a succeeding element. v Y

In testimony whereof I haveV aiixed my signature. Y

DAVID G. LORRAINE.

i so

zle whereby the induced flow is moved cirv cumferentially around the nozzle for whirling discharge through the Venturi tube; a

straight coupling sleeve connecting the discharge end of one of said interchangeable elements with the lateral inlet of a succeeding element, an inlet pipe connected to the lateral inlet of the first element, an outlet pipe connected to the discharge end of the succeeding element, and pipes longitudinally adjustably connected to the outer ends of the nozzles which proj ect outwardly through the supply ends of the elements, said pipes supplying iuid under pressure to the nozzles.

2. A n ejector comprising a plurality of identical interchangeable elements; each including a casing having anaxial bore and a lateral inlet, one end of the axial bore being a supply endand the opposite end of the axial bore being a discharge end, and a nozzle projecting into the supply end of the axial bore, the nozzle forming a jet inducing flow through the lateral inlet and discharging said flow under pressure through the discharge end of the casing; and a straight coupling sleeve connecting the discharge end of one of said interchangeable elementswith the lateral inlet of a succeeding element.

3. An ejector comprising a plurality of 

